I have a Duramax Dually and I'll need to buy some new tires for it before next towing season. I have Michelin's and I'm not exactly impressed with them. I think I have about 45,000 miles on a 70,000 mile tire and can probably squeeze another 5,000 miles out of them. I rotate once a year (about 7,000 miles) and may have missed one along the way. I know that duallie's eat tires and figured I check with other dually owners to see what the recommendation is and what really works. I use them year around, so they need to be mud and snow rated so I don't have to swap out six tires to go over the mountain passes. I know they aren't as good a true snow tire, but it's a 6x6 so that helps too. Around here Les Schwab is a preferred tire provider. They are pitching Cooper's and their own label. Costco would be another option since I have a membership for a Christmas card that I haven't activated. I figured batteries and tires from Costco might be worth cashing that card in and using since I'll need both and maybe 6 new trailer tires as well. The truck sees about 3,000 miles of towing, plus or minus every year. I know that's much harder on tires as well. Just thought I'd see what others have used and would steer away from or recommend. Thanks!